done that, many times. that they do not check the contents is a matter of corrupt arrangement. they do not have the manpòwer to check all the boxes, but they could do random checks on ALL. i know guys here whose stuff does not get checked in customs. they have a hook at Manzanillo, and the container goes from ship to business...that is common knowledge. if you try to import on your own, of course it will get checked...the guys need their comision, and you are not one of their ¨preferred customers¨: